I think it's two things. We develop our intuition for how many maladjusted people there are from our physical surroundings, but we're limited in how many we can

I think it's two things. We develop our intuition for how many maladjusted people there are from our physical surroundings, but we're limited in how many we can meet and are unlikely to meet the extreme outliers; on the internet everyone is our neighbor. And then on top of that, they are overrepresented because they are much more likely to be removed from communities to arrive at new ones.